Chase Down and Get Rid Of Rivas
Sprint back outside and hop in your car, then chase Rivas, Don't let him escape! He leads you on a wild ride, speeding and weavin, Try nailing him with gunfire while driving on his tai. Watch out for the truck that dumps its cargo-load of barrels on the expressway. If you get close enough, ram his car. Once you inflict enough damage to his vehicle, Rivas hops out and you cn just run over him.
Don't Let Rivas Escape on Foot
If you miss in your attempt to squish Rivas beneath your wheels, hop out and chase hm down on foot, firing as you go, when you finally drop Rivas, Niko calls Brucie to announce the job is done.
so no, i don't think there is an ending destination.